A person who hauls methamphetamine or the materials needed to make it (see also scun). In recent times the word scun and all of it's meth related deriviatives have a very strong usage in south central Arkansas (where meth use has been epidemic for at least 20 years due to chronic boredom) in spite of originally being a Southern California 1960s slan term for meth.

That scunrunner must have been goin' about 150 when he came though here with the county deputies and drug task force chasing him.